---
title: "Reference: Convex Storage | Storage"
description: Documentation for the Convex storage implementation in Mastra.
---

# Convex Storage

The Convex storage implementation provides a serverless storage solution using [Convex](https://convex.dev), a full-stack TypeScript development platform with real-time sync and automatic caching.

## Installation

```bash copy
npm install @mastra/convex@beta
```

## Convex Setup

Before using `ConvexStore`, you need to set up the Convex schema and storage handler in your Convex project.

### 1. Set up Convex Schema

In `convex/schema.ts`:

```typescript copy
import { defineSchema } from 'convex/server';
import {
  mastraThreadsTable,
  mastraMessagesTable,
  mastraResourcesTable,
  mastraWorkflowSnapshotsTable,
  mastraScoresTable,
  mastraVectorIndexesTable,
  mastraVectorsTable,
  mastraDocumentsTable,
} from '@mastra/convex/server';

export default defineSchema({
  mastra_threads: mastraThreadsTable,
  mastra_messages: mastraMessagesTable,
  mastra_resources: mastraResourcesTable,
  mastra_workflow_snapshots: mastraWorkflowSnapshotsTable,
  mastra_scorers: mastraScoresTable,
  mastra_vector_indexes: mastraVectorIndexesTable,
  mastra_vectors: mastraVectorsTable,
  mastra_documents: mastraDocumentsTable,
});
```

### 2. Create the Storage Handler

In `convex/mastra/storage.ts`:

```typescript copy
import { mastraStorage } from '@mastra/convex/server';

export const handle = mastraStorage;
```

### 3. Deploy to Convex

```bash copy
npx convex dev
# or for production
npx convex deploy
```

## Usage

```typescript copy showLineNumbers
import { ConvexStore } from "@mastra/convex";

const storage = new ConvexStore({
  id: 'convex-storage',
  deploymentUrl: process.env.CONVEX_URL!,
  adminAuthToken: process.env.CONVEX_ADMIN_KEY!,
});
```

## Parameters

<PropertiesTable
  content={[
    {
      name: "deploymentUrl",
      type: "string",
      description:
        "Convex deployment URL (e.g., https://your-project.convex.cloud)",
      isOptional: false,
    },
    {
      name: "adminAuthToken",
      type: "string",
      description:
        "Convex admin authentication token for backend access",
      isOptional: false,
    },
    {
      name: "storageFunction",
      type: "string",
      description:
        "Path to the storage mutation function (default: 'mastra/storage:handle')",
      isOptional: true,
      defaultValue: "mastra/storage:handle",
    },
  ]}
/>

## Constructor Examples

```ts
import { ConvexStore } from "@mastra/convex";

// Basic configuration
const store = new ConvexStore({
  id: 'convex-storage',
  deploymentUrl: "https://your-project.convex.cloud",
  adminAuthToken: "your-admin-token",
});

// With custom storage function path
const storeCustom = new ConvexStore({
  id: 'convex-storage',
  deploymentUrl: "https://your-project.convex.cloud",
  adminAuthToken: "your-admin-token",
  storageFunction: "custom/path:handler",
});
```

## Additional Notes

### Schema Management

The storage implementation uses typed Convex tables for each Mastra domain:

| Domain         | Convex Table                | Purpose              |
| -------------- | --------------------------- | -------------------- |
| Threads        | `mastra_threads`            | Conversation threads |
| Messages       | `mastra_messages`           | Chat messages        |
| Resources      | `mastra_resources`          | User working memory  |
| Workflows      | `mastra_workflow_snapshots` | Workflow state       |
| Scorers        | `mastra_scorers`            | Evaluation data      |
| Fallback       | `mastra_documents`          | Unknown tables       |

### Architecture

All typed tables include:

- An `id` field for Mastra's record ID (distinct from Convex's auto-generated `_id`)
- A `by_record_id` index for efficient lookups by Mastra ID

This design ensures compatibility with Mastra's storage contract while leveraging Convex's automatic indexing and real-time capabilities.

### Environment Variables

Set these environment variables for your deployment:

- `CONVEX_URL` – Your Convex deployment URL
- `CONVEX_ADMIN_KEY` – Admin authentication token (get from Convex dashboard)

## Related

- [Convex Vector Store](../vectors/convex)
- [Convex Documentation](https://docs.convex.dev/)

